Retinal syringe

Abstract

The utility model provides a retina injector. The retina injector comprises a liquid injection body, an injection needle, a piston and an administration dosage control structure. The liquid injection body is provided with a hollow cavity used for containing liquid, a liquid injection opening and a material pushing opening, the liquid injection opening is communicated with the cavity and used for injecting the liquid into the cavity, and the material pushing opening is formed in one end of the cavity and communicated with the cavity. The injection needle is connected to one end of the liquid injection body. The piston is arranged in the cavity in a sliding mode through the material pushing opening. The administration dosage control structure is arranged in a mounting groove in the liquid injection body and is sealed with the mounting groove. The administration dosage control structure comprises a fixing assembly, a cover plate, a first material blocking part and a second material blocking part, the first material blocking part and the second material blocking part are both connected to the cover plate, the cover plate is movably connected to the fixing assembly, and the first material blocking part and the second material blocking part are of a linkage structure which ascends and descends in the cavity. The cover plate is operated so that the first material blocking piece or the second material blocking piece can movably stretch into the cavity to prevent the piston from sliding forwards.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a retinal injector. Background Technology

[0002] Subretinal injection is a route of intravitreal drug administration and a therapeutic surgical procedure in ophthalmology. It involves injecting medication under the retina to achieve a therapeutic effect. Because systemic drug administration is less efficient due to the blood-retinal barrier, while intravitreal administration uses smaller doses but is more effective, making it a rapidly developing technique in ophthalmology in recent years. Furthermore, with the development of subretinal anticoagulants and gene therapy technologies, the clinical application of subretinal injection is gradually increasing.

[0003] In current technology, the conventional technique for subretinal injection involves using a 1ml syringe with an external 41G puncture needle; alternatively, a syringe connected via tubing is also used. However, both methods have the following drawbacks: First, a specialist is required to administer the medication and monitor the dosage, and since the dosage used during the procedure is often fixed, this can easily lead to errors in dosage administration. Second, the assembly and use of the injection device are cumbersome, affecting surgical efficiency. Third, the needle puncture depth is difficult to control during injection, easily damaging the pigment epithelium or choroid, causing tearing and bleeding. Currently, there are standalone 41G puncture needles and puncture instruments that can be connected to tubing and vitrectomy machines, but none of these completely solve the above problems.

[0004] Therefore, it is necessary to provide a retinal injector that is easy and safe to operate and can inject drugs in a quantitative manner. Utility Model Content

[0005] The purpose of this invention is to provide a retinal injector that is easy and safe to operate and can inject drugs in a quantitative manner.

[0006] To achieve the above objectives, this utility model provides a retinal injector, comprising:

[0007] The liquid injection body is provided with a hollow cavity for containing liquid, and has an injection port and a push port. The injection port is connected to the cavity for injecting liquid into the cavity, and the push port is opened at one end of the cavity and connected to the cavity.

[0008] The injection needle is detachably connected to the end of the injection body away from the push port;

[0009] The piston is slidably disposed within the cavity via the push port;

[0010] A dosage control structure is disposed on the injection body, which also has an installation groove communicating with the cavity. The dosage control structure is installed in the installation groove and sealed with the installation groove. The dosage control structure includes a fixing component, a cover plate, a first stop and a second stop. The first stop and the second stop are both connected to the cover plate. The cover plate is movably connected to the fixing component. The first stop and the second stop have a linkage structure in the cavity, which moves up and down in turn. The cover plate is operated so that the first stop or the second stop can move into the cavity to block the piston from sliding forward.

[0011] Compared with existing technologies, the retinal injector of this invention can inject liquid medication into the cavity through the injection port, and then push the piston to administer medication through the injection needle. The injection body has a mounting groove for mounting a dosage control structure, which includes a fixing component, a cover plate, a first stop, and a second stop. Both the first and second stops are movably connected to the fixing component via the cover plate, and they are linked in a rising-falling mechanism within the cavity. When the cover plate is pressed, either the first or second stop extends into the cavity to prevent the piston from sliding forward. It is understood that the first and second stops move in a linked manner on the fixing component, and are symmetrical to ensure that the internal space remains constant when either the first or second stop is pressed, thus not affecting the dosage. Furthermore, pressing the first stop inserts the medication into the cavity, and pressing the second stop inserts the medication into the cavity. Depending on the actual medication needs, either the first or second stop can be pressed to make medication administration more precise, quantitatively injecting the drug, and ensuring greater safety and reliability. This retinal injector is more convenient and safer to operate, enabling quantitative injection of the drug solution.

[0012] Preferably, the fixing component includes a base, which is fixed in the mounting groove and its two sides are sealed to the inner wall of the mounting groove. The other two sides of the base are sealed to the first stop and the second stop, and the first stop and the second stop are sealed to the inner wall of the mounting groove.

[0013] Preferably, the fixing component also includes a rotating shaft, and the base is provided with a rotating part that cooperates with the rotating shaft, the rotating shaft being rotatably disposed within the rotating part.

[0014] Preferably, the first and second stoppers are symmetrically located on both sides of the cover plate. The cover plate is provided with a connecting part connected to the rotating shaft. The cover plate is movably connected to the rotating shaft through the connecting part. Pressing the cover plate causes it to rotate along the rotating shaft through the connecting part, so that the first or second stopper can be movably extended into the cavity to block the sliding of the piston.

[0015] Preferably, the connecting part protrudes from the cover plate and is provided with a connecting hole. The rotating shaft passes through the connecting hole and presses the cover plate to make the cover plate rotate along the rotating shaft through the connecting hole, thereby driving the first and second material stops on both sides to move up and down in the cavity in a coordinated manner.

[0016] Preferably, the connecting part protrudes from the cover plate and is provided with a slot that engages with the rotating shaft. Pressing the cover plate causes the cover plate to rotate along the rotating shaft via the slot, and drives the first and second stop members on both sides to move up and down in the cavity in a coordinated manner.

[0017] Preferably, the first and second stoppers are integral with the cover plate, or the first and second stoppers are connected to the cover plate; and the first and second stoppers are provided with sealing rubber for sealing.

[0018] Preferably, the injection needle is provided with graduations to determine the injection depth.

[0019] Preferably, the injection end of the injection needle is provided with a tilted portion, the tilt angle of which is between 30 degrees and 45 degrees.

[0020] Preferably, one end of the piston is connected to a glass cutter, which includes a silicone oil injection pipe and a foot pedal pneumatic control mechanism. The silicone oil injection pipe is connected to the piston, and the foot pedal pneumatic control mechanism is used to control the injection of silicone oil into the silicone oil injection pipe to push the piston to slide along the cavity. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a retinal injector provided in one embodiment of the present invention.

[0023] Figure 2 yes Figure 1 A schematic diagram of the internal structure of the Chinese medicine dosage control structure.

[0024] Figure 3 yes Figure 2 Structural diagram of the dosage control structure for traditional Chinese medicine.

[0025] Figure 4 yes Figure 1 A partial structural cross-sectional view of one embodiment of the drug administration dosage control structure.

[0026] Figure 5 yes Figure 1 A partial structural cross-sectional view of another embodiment of the drug delivery control structure.

[0027] Figure 6 yes Figure 5 A partial structural cross-sectional view of another state of the drug dosage control structure.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Retinal injector;

[0030] 10. Injection body; 101. Cavity; 11. Injection port; 12. Push port; 13. Mounting groove;

[0031] 20. Injection needle; 21. Scale mark; 22. Inclined part;

[0032] 30. Piston;

[0033] 40. Dosage control structure; 401. Fixing component; 41. Seat; 411. Rotating part; 412. Rotating hole; 413. Straight part; 42. Rotating shaft; 43. First stop; 431. Sealing rubber; 44. Second stop; 45. Cover plate; 451. Connecting part; 452. Connecting hole; 453. Rotating mating part. Detailed Implementation

[0034] To explain the technical content and structural features of this utility model in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0035] Please see Figures 1 to 6This invention provides a retinal injector 100, including an injection body 10, an injection needle 20, a piston 30, and a dosage control structure 40. The injection body 10 has a hollow cavity 101 for containing liquid, and has an injection port 11 and a dispensing port 12. The injection port 11 is connected to the cavity 101 for injecting liquid into the cavity 101. The dispensing port 12 is located at one end of the cavity 101 and is connected to the cavity 101, allowing the piston 30 to extend into and dispense the liquid. The injection needle 20 is detachably connected to the end of the injection body 10 away from the dispensing port 12 and is used for retinal injection. The piston 30 is slidably disposed within the cavity 101 via the dispensing port 12, for pushing the liquid in the cavity 101 through the injection needle 20 into the retina for treatment. On the other hand, the dosage control structure 40 is disposed on the injection body 10, and the injection body 10 is also provided with an installation groove 13 communicating with the cavity 101. The dosage control structure 40 is installed in the installation groove 13 and is sealed with the installation groove 13 to prevent the liquid medicine in the cavity 101 from leaking out through the installation groove 13. The dosage control structure 40 includes a fixing component 401, a cover plate 45, a first stop 43 and a second stop 44, both of which are connected to the cover plate 45. The cover plate 45 is movably connected to the fixing component 401 and drives the first stop 43 and the second stop 44 to slide up and down relative to the seat 41. The first stop 43 and the second stop 44 have a linkage structure in the cavity 101, which moves up and down in turn. By operating the cover plate 45, the first stop 43 or the second stop 44 can be moved into the cavity 101 to block the piston 30 from sliding forward. Understandably, when the cover plate 45 is pressed down near the first stop 43, the first stop 43 slides downward along the outer wall of the mounting groove 13 and the outer wall of the upper seat 41 of the fixing assembly 401, protruding from the cavity 101 to limit the piston 30, ensuring that the piston 30 can only slide to this position, thus achieving quantitative injection of the medicine. Simultaneously, as the first stop 43 slides downward, the second stop 44 slides upward. The first and second stop 43 move in sync, and the space occupied by the first stop 43 as it slides downward is filled by the space created by the upward sliding of the second stop 44, preventing the medicine from being squeezed out and ensuring more precise quantitative injection. On the other hand, when the cover plate 45 is pressed down near the second stop 44, the second stop 44 slides downward, while the first stop 43 slides upward. The second stop 44 protrudes from the cavity 101 to limit the piston 30, thereby achieving quantitative injection of the medicine.

[0036] Compared with the prior art, the retinal injector 100 of this invention can inject liquid medicine into the cavity 101 through the injection port 11, and then push the piston 30 to administer the medicine through the injection needle 20. The injection body 10 has a mounting groove 13 for mounting a drug delivery control structure 40. The drug delivery control structure 40 includes a fixing component 401, a cover plate 45, a first stop 43, and a second stop 44. Both the first stop 43 and the second stop 44 are movably connected to the fixing component 401 through the cover plate 45, and the first stop 43 and the second stop 44 have a linked structure that moves up and down within the cavity 101. When the cover plate 45 is pressed, the first stop 43 or the second stop 44 can extend into the cavity 101 to prevent the piston 30 from sliding forward. Understandably, the first stop 43 and the second stop 44 move in tandem on the fixed assembly 401, moving in unison. The first stop 43 and the second stop 44 are symmetrical, ensuring that the internal space of the cavity 101 remains constant when either the first stop 43 or the second stop 44 is pressed, thus not affecting the dosage. Furthermore, pressing the first stop 43 extends it into the cavity 101, and pressing the second stop 44 extends it into the cavity 101. Depending on the actual drug administration needs, pressing either the first stop 43 or the second stop 44 allows for more precise and quantitative drug injection, making it safer and more reliable. This retinal injector 100 of the present invention is more convenient and safer to operate, enabling quantitative injection of medication.

[0037] Please see Figures 2 to 6 In some optional embodiments, the fixing component 401 includes a seat 41, which is fixed within the mounting groove 13. The two sides of the seat 41 are sealed to the inner wall of the mounting groove 13, and the other two sides of the seat 41 are sealed to the first stop 43 and the second stop 44. The first stop 43 and the second stop 44 are also sealed to the inner wall of the mounting groove 13. For example, the mounting groove 13 is cylindrical. The seat 41 fits tightly with the first stop 43 and the second stop 44 on both sides to form a cylindrical shape for a sealed fit with the mounting groove 13. Specifically, the seat 41 has straight portions 413 on both sides for engaging with the first stop 43 and the second stop 44. The surfaces of the first stop 43 and the second stop 44 that engage with the straight portions 413 are planar, while the outer surfaces are arc-shaped, forming a cylindrical shape with the seat 41. Of course, the mounting slot 13 can also be rectangular, with the entire dosing control structure 40 adapted to and sealed within the mounting slot 13. The only requirement is that the entire dosing control structure 40 can seal the mounting slot 13 within it.

[0038] Please see Figures 2 to 6In some optional embodiments, the fixing assembly 401 further includes a rotating shaft 42, and a rotating part 411 that cooperates with the rotating shaft 42 is provided on the seat 41. The rotating shaft 42 is rotatably disposed within the rotating part 411, and a rotating hole 412 may be provided within the rotating part 411. On the other hand, the first stop 43 and the second stop 44 are symmetrically located on both sides of the cover plate 45 so that the volume within the cavity 101 remains constant during the lifting and sliding process of the first stop 43 and the second stop 44. A connecting part 451 connected to the rotating shaft 42 is provided on the cover plate 45, and the cover plate 45 is movably connected to the rotating shaft 42 via the connecting part 451. Pressing the cover plate 45 causes the cover plate 45 to rotate along the rotating shaft 42 via the connecting part 451, so that the first stop 43 or the second stop 44 can movably extend into the cavity 101 to block the sliding of the piston 30. For example, the connecting portion 451 protrudes from the cover plate 45 and is provided with a connecting hole 452. The rotating shaft 42 passes through the connecting hole 452. Pressing the cover plate 45 causes it to rotate along the rotating shaft 42 via the connecting hole 452, thereby driving the first stop members 43 and the second stop members 44 on both sides to move up and down in a linked manner within the cavity 101. In other embodiments, the connecting portion 451 protrudes from the cover plate 45 and is provided with a slot that engages with the rotating shaft 42. Pressing the cover plate 45 causes it to rotate along the rotating shaft 42 via the slot, thereby driving the first stop members 43 and the second stop members 44 on both sides to move up and down in a linked manner within the cavity 101. It is understood that as long as the cover plate 45 can drive the first stop members 43 and the second stop members 44 on both sides to move up and down in a linked manner, it is acceptable. After the injection is completed, if it is necessary to use the retinal injector 100 for further injection, the other side of the cover plate 45 can be pressed until the first stop 43 and the second stop 44 contact the piston 30, then the reset is completed and the piston 30 is withdrawn.

[0039] Please see Figures 3 to 6 In some alternative embodiments, such as Figure 4 As shown, the first stop 43 and the second stop 44 are integrally formed with the cover plate 45, and sealing rubber 431 for sealing is provided on the first stop 43 and the second stop 44. The sealing rubber 431 can move elastically within a certain range and can better seal the mounting groove 13. It can be understood that since the first stop 43 and the second stop 44 are integrally formed with the cover plate 45, when the cover plate 45 is pressed and the first stop 43 and the second stop 44 slide, they will move laterally. The sealing rubber 431 ensures the smooth sliding of the first stop 43 and the second stop 44. The first stop 43 and the second stop 44 can be integrally formed with their respective sealing rubber 431, making the structure more stable. Figure 5 and Figure 6As shown, the first stop 43 and the second stop 44 are connected to the cover plate 45. A rotating engagement part 453 is provided between the first stop 43 and the second stop 44 and the cover plate 45. When the cover plate 45 is pressed, the first stop 43 and the second stop 44 can rotate at a certain angle, allowing them to slide smoothly up and down. Simultaneously, sealing rubber 431 can also be provided on the first stop 43 and the second stop 44 for sealing. It is understandable that pressing the cover plate 45 requires a certain force to prevent the first stop 43 and the second stop 44 from sliding on their own. The sealing rubber 431 not only improves the sealing effect but also increases friction.

[0040] Please see Figure 1 and Figure 2 In some optional embodiments, the injection needle 20 is provided with a scale line 21, which is used to determine the injection depth of the injection needle 20, making the injection more precise. In addition, the injection end of the injection needle 20 is provided with a tilting part 22, the tilting angle of which is between 30 degrees and 45 degrees, allowing for better alignment. On the other hand, one end of the piston 30 is connected to a glass cutter, which includes a silicone oil injection pipe and a foot pedal pneumatic control mechanism. The silicone oil injection pipe is connected to the piston 30, and the foot pedal pneumatic control mechanism is used to control the injection of silicone oil into the silicone oil injection pipe, thereby pushing the piston 30 to slide along the cavity 101. For example, firstly, the piston 30 is connected to the silicone oil injection pipe of the glass cutter. Secondly, the injection port 11 on the injection body 10 is opened, and the medicine is injected into the cavity 101 until the medicine fills the cavity 101 and the needle, and then the injection port is closed. Then, according to the required dosage for the surgery, press the corresponding first stop 43 or second stop 44 of the dosage control structure 40 to determine the endpoint of the drug delivery: 0.1ml / 0.3ml, or 0.5ml if not pressed. Next, insert the injection needle 20 through the conventional vitrectomy puncture site, and insert the 41-gauge needle into the subretinal region at the target site. Observe the scale markings on the needle to avoid excessive insertion. Finally, by stepping on the foot pedal pneumatic control mechanism of the vitrectomy machine, the piston 30 is pushed forward until the endpoint is reached, at which point the drug delivery is complete, and the dosage can be 0.1ml, 0.3ml, or 0.5ml. Of course, other stops can be set according to actual usage needs.

[0041] like Figures 1 to 6As shown, the retinal injector 100 of this invention can inject liquid medication into the cavity 101 through the injection port 11. Then, by stepping on the foot pedal air pressure control mechanism of the vitrification machine, the piston 30 is automatically pushed to administer the medication. This is convenient to operate and allows for better control of the dosage control structure 40. An installation groove 13 is provided on the injection body 10 for installing the dosage control structure 40. The dosage control structure 40 includes a fixing component 401, a cover plate 45, a first stop 43, and a second stop 44. The first stop 43 and the second stop 44 are movably connected to the fixing component 401 through the cover plate 45. The first stop 43 and the second stop 44 have a linked structure within the cavity 101, where they move in tandem. When the cover plate 45 is pressed, either the first stop 43 or the second stop 44 extends into the cavity 101 to prevent the piston 30 from sliding forward. Understandably, the first stop 43 and the second stop 44 move in tandem on the fixed assembly 401, moving in unison. The first stop 43 and the second stop 44 are symmetrical, ensuring that the internal space of the cavity 101 remains constant when either the first stop 43 or the second stop 44 is pressed, thus not affecting the dosage. Furthermore, pressing the first stop 43 extends it into the cavity 101, and pressing the second stop 44 extends it into the cavity 101. Depending on the actual drug administration needs, pressing either the first stop 43 or the second stop 44 allows for more precise and quantitative drug injection, making it safer and more reliable. This retinal injector 100 of the present invention is more convenient and safer to operate, enabling quantitative injection of medication.

[0042] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall fall within the scope of the present utility model.

Claims

1. A retinal injector, characterized in that, include: The liquid injection body is provided with a hollow cavity for containing liquid, and has an injection port and a push port. The injection port is connected to the cavity for injecting liquid into the cavity, and the push port is opened at one end of the cavity and connected to the cavity. The injection needle is detachably connected to the end of the injection body away from the push port; The piston is slidably disposed within the cavity via the push port; A dosage control structure is disposed on the injection body, and the injection body also has an installation groove communicating with the cavity. The dosage control structure is installed in the installation groove and sealed between the installation groove and the installation groove. The dosage control structure includes a fixing component, a cover plate, a first stop and a second stop. The first stop and the second stop are both connected to the cover plate. The cover plate is movably connected to the fixing component, and the first stop and the second stop have a linkage structure in the cavity, which moves up and down in turn. By operating the cover plate, the first stop or the second stop can be moved into the cavity to block the piston from sliding forward.

2. The retinal injector of claim 1, wherein, The fixing component includes a base, which is fixed in the mounting groove and its two sides are sealed to the inner wall of the mounting groove. The other two sides of the base are sealed to the first baffle and the second baffle, and the first baffle and the second baffle are sealed to the inner wall of the mounting groove.

3. The retinal injector of claim 2, wherein The fixing component further includes a rotating shaft, and the base is provided with a rotating part that cooperates with the rotating shaft. The rotating shaft is rotatably disposed within the rotating part.

4. The retinal injector of claim 3, wherein, The first and second stoppers are symmetrically located on both sides of the cover plate. The cover plate is provided with a connecting part connected to the rotating shaft. The cover plate is movably connected to the rotating shaft through the connecting part. Pressing the cover plate causes it to rotate along the rotating shaft through the connecting part, so that the first or second stopper can be movably extended into the cavity to block the sliding of the piston.

5. The retinal injector of claim 4, wherein, The connecting part protrudes from the cover plate and is provided with a connecting hole. The rotating shaft passes through the connecting hole. Pressing the cover plate causes the cover plate to rotate along the rotating shaft via the connecting hole, and drives the first and second baffles on both sides to move up and down in the cavity in a coordinated manner.

6. The retinal injector of claim 4, wherein, The connecting part protrudes from the cover plate and is provided with a slot that engages with the rotating shaft. Pressing the cover plate causes it to rotate along the rotating shaft via the slot, which in turn drives the first and second baffles on both sides to move up and down in the cavity.

7. The retinal injector of claim 4, wherein, The first and second baffles are integral with the cover plate, or the first and second baffles are connected to the cover plate; and the first and second baffles are provided with sealing rubber for sealing.

8. The retinal injector according to claim 1, characterized in that, The injection needle is provided with scale lines, which are used to determine the injection depth of the injection needle.

9. The retinal injector of claim 1, wherein, The injection needle has an injection end with an inclined portion, the inclination angle of which is between 30 degrees and 45 degrees.

10. The retinal injector of claim 1, wherein, One end of the piston is connected to a glass cutting machine, which includes a silicone oil injection pipe and a foot pedal air pressure control mechanism. The silicone oil injection pipe is connected to the piston, and the foot pedal air pressure control mechanism is used to control the injection of silicone oil into the silicone oil injection pipe to push the piston to slide along the cavity.

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